Bigotry against old people is deeply embedded in American society, and is generally accepted even as other forms of bigotry are criticized.

On a few specific issues, there is a reason to distinguish. For old people to have children is unwise because the old parents are very likely to die before those children grow up. That would put the children in difficulty as well as pain.

Of course, it is unwise for younger people to have children, too, in today's society and circumstances.

One very common form of bigotry against the old is to snear at them for romantic or sexual involvements with people who are not old. Many people think they are entitled to demand that old people confine themselves to relationships with old people.

It's comparable to telling blacks that they should only have relationships with blacks, or telling men that they should only have relationships with women.

Billionaires Fear Warren And Sanders — But They Should Fear Us All.

The US threatens Thailand with a trade war if it goes ahead with plans to ban three toxic pesticides.

The true danger of physically powerful robots is not that they might rebel against all humans, but that they might obey some humans just as they are designed to do.

Realistic 3d-printed artificial meat, made mostly from vegetable material, is likely to be available soon.

Reportedly it tastes and feels like real meat. It will require far less greenhouse gas emissions, and it might be much better for people's health.

If it catches on, there will be lots of unemployed soy bean farmers. The world needs to provide for them somehow — perhaps paying them to replant local forest trees on the disused farmland. We will need libre 3d-printers to make our own artificial meat and not be subject to DRM. People should start developing these now.